Landouria madurensis, Nurinsiyah & Neiber & Hausdorf, 2019

Nurinsiyah, Ayu Savitri, Neiber, Marco T. & Hausdorf, Bernhard, 2019, Revision of the land snail genus Landouria Godwin-Austen, 1918 (Gastropoda, Camaenidae) from Java, European Journal of Taxonomy 526, pp. 1-73 : 41-42

Landouria madurensis sp. nov.

urn:lsid:zoobank.org:act:024A8B78-91C2-49CA-8721-C0B8CCC46982

Figs 8 , 22 , 36 , 53 , 57 ; Tables 3–4

Helix squamulosa Martens, 1867: 266 , pl. 13, fig. 10 (“ Insel Madura (an der Nordostseite von Java), bei Sumanap”) (objective junior synonym of Helix squamulosa Mousson, 1856 ). Syn. nov.

Helix squamulosa – Pfeiffer 1871 in 1870–1876: pl. 117, figs 13–15; 1872 in 1870–1876: 41. Landouria squamulosa – van Benthem Jutting 1941: 311 .

Diagnosis

Landouria madurensis sp. nov. is characterized by a sharply keeled shell with longish scales all over the teleoconch, a wide umbilicus, a long penis, which is divided into a longer, broader distal and a shorter, narrower proximal part, and a long flagellum, which gradually tapers towards its proximal end.

Etymology

Landouria madurensis sp. nov. is named after its occurrence on Madura Island.

Material examined

Holotype

INDONESIA • holotype (det. anat.); East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest; 6°54′01″ S, 113°12′08″ E; 17 m a.s.l.; 14 May 2014; A.S. Nurinsiyah and T. Setiadi leg.; D = 11.4 mm, H = 6.5 mm; MZB 21432.

Paratypes

INDONESIA • 1 spec.; same data as for holotype; MZB 19209 • 4 spec.; same data as for holotype; MZB 19210 • 1 spec.; same data as for holotype; ZMH 133408 • 4 spec.; same data as for holotype; ZMH 133437 • 2 spec. (also syntypes of H. squamulosa ); Sumenep (see Martens 1867: 267); 7°01′ S, 113°52′ E; ZMB 7155 .

Description

SHELL ( Figs 8 , 57; Tables 3–4 ). Depressed conical, with 5.5–5.75 hardly convex whorls; protoconch almost smooth; teleoconch with irregular wrinkles; without distinct incised spiral lines; longish scales all over teleoconch; tuberculate around umbilicus; brownish-corneous; body whorl sharply keeled; aperture rounded rhombic; upper insertion of peristome descending; peristome expanded, reflexed and thickened; umbilicus slightly eccentric, very wide, comprising 38–40% of shell diameter, hardly obscured by columellar edge.

GENITALIA ( Figs 22 , 36 ; Table 4 ). Atrium short; penis long, divided into a longer, broader distal and a shorter, narrower proximal part, without penis coecum; membranaceous sheath around distal part of penis connected with proximal part of epiphallus by tissue; penial retractor runs from diaphragm to middle part of cylindrical epiphallus; flagellum long, broadest in its middle part, gradually tapering towards its proximal end, slightly crenated, without node; vas deferens narrow and long; vagina cylindrical, long; oviduct shorter, proximally hardly tapering; peduncle of bursa copulatrix subdivided into a broader, cylindrical distal part and a narrower, longer proximal part. Right ommatophoral retractor runs between penis and vagina.

Remarks

Landouria madurensis sp. nov. differs from the neighbouring Landouria intumescens in the presence of longish scales all over the teleoconch ( Fig. 8 ), a wider umbilicus (U/D 0.38–0.40 vs 0.22–0.34 in L. intumescens ) and a relatively long vagina (P:V 2.1 vs 2.4–3.9 in L. intumescens ).

A second, more conical species of Landouria without longish scales and with a narrower umbilicus, of which only juveniles were found, lives sympatrically with Landouria madurensis sp. nov. in Nepa Monkey lowland rainforest on Madura Island.

Distribution

Landouria madurensis sp. nov. is endemic to Madura Island (Fig. 53).

Figures

Figs 6–11. Shell sculpture of species of Landouria from Java (umbilical side of shell in 6; apical side in 7–11). 6. L. conoidea (Leschke, 1914), West Java, Bogor (syntype, ZMH 98144). 7. L. tholiformis sp. nov., Yogyakarta, Gunung Kidul, Tepus, near Poktunggal Beach (holotype, MZB 17999). 8. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (paratype, MZB 19209). 9. L. pacitanensis sp. nov., East Java, Pacitan, Srau Beach (paratype, ZMH 148510). 10. L. monticola van Benthem Jutting, 1950, West Java, Gunung Cikuray (paratype, SMF 8880). 11. L. smimensis (Mousson, 1848), East Java, Tosari (ZMA 390881). Scale bars: 1 mm.

Figs 15–24. Genitalia of species of Landouria from Java. 15. L. winteriana (Pfeiffer, 1842), West Java, Padalarang, Gunung Masigit (neotype, ZMA 376193a). 16. L. rotatoria (Pfeiffer, 1842), West Java, Gunung Salak, 1166 m a.s.l. (neotype, MZB 19205). 17. L. epiplatia (Möllendorff, 1897)?, West Java, Bogor, Gunung Gede (ZMH 79946). 18. L. nusakambangensis sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 412298a). 19. L. petrukensis sp. nov., Central Java, Karangbolong, way to Petruk Cave (holotype, MZB 19203). 20. L. tholiformis sp. nov., Yogyakarta, Gunung Kidul, Tepus, near Poktunggal Beach (holotype, MZB 17999). 21. L. abdidalem sp. nov., Yogyakarta, Kulonprogo, Sabrang Kidul (holotype, MZB 17664). 22. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (paratype, MZB 19209). 23. L. sewuensis sp. nov., Yogyakarta, Gunung Kidul, Tepus, Mbajo Hill (holotype, MZB 19255). 24. L. sukoliloensis sp. nov., Central Java, Kayen, near Watu Payung (holotype, MZB 19219). Scale bars: 1 mm.

Figs 29–47. Flagella of species of Landouria from Java. 29. L. winteriana (Pfeiffer, 1842), West Java, Padalarang, Gunung Masigit (neotype, ZMA 376193a). 30. L. rotatoria (Pfeiffer, 1842), West Java, Gunung Salak, 1166 m a.s.l. (neotype, MZB 19205). 31. L. epiplatia (Möllendorff, 1897)?, West Java, Bogor, Gunung Gede (ZMH 79946). 32. L. nusakambangensis sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 412298a). 33. L. petrukensis sp. nov., Central Java, Karangbolong, way to Petruk Cave (holotype, MZB 19203). 34. L. tholiformis sp. nov., Yogyakarta, Gunung Kidul, Tepus, near Poktunggal Beach (holotype, MZB 17999). 35. L. abdidalem sp. nov., Yogyakarta, Kulonprogo, Sabrang Kidul (holotype, MZB 17664). 36. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (paratype, MZB 19209). 37. L. sewuensis sp. nov., Yogyakarta, Gunung Kidul, Tepus, Mbajo Hill (holotype, MZB 19255). 38. L. sukoliloensis sp. nov., Central Java, Kayen, near Watu Payung (holotype, MZB 19219). 39. L. tonywhitteni sp. nov., Central Java, Taruman Village, near Sendang Sedayu (holotype, MZB 19214). 40. L. nodifera sp. nov., Central Java, Larangan Village, Lanang Spring (holotype, MZB 19227). 41. L. pacitanensis sp. nov., East Java, Pacitan, near Srau Beach (MZB 19231). 42. L. intumescens (Martens, 1867), East Java, Guwoterus (MZB 19207). 43. L. smimensis (Mousson, 1848), East Java, Tosari (ZMA 390881). 44. L. zonifera sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 17727). 45. L. ciliocincta (Möllendorff, 1897), East Java, Malang, Kondangmerak (MZB 19211). 46. L. pakidulan sp. nov., Central Java, Nusa Kambangan Island, nature monument Gligir (holotype, ZMA 417011a). 47. L. menorehensis sp. nov., Yogyakarta, Kulonprogo, Sibolong (holotype, MZB 19201). Scale bar: 1 mm.

Figs 52–55 (opposite page). Distribution of species of Landouria in Java (10′ grid). 52. L. winteriana (Pfeiffer, 1842), L. naggsi sp. nov., L. nusakambangensis sp. nov., L. petrukensis sp. nov., L. tholiformis sp. nov., L. tonywhitteni sp. nov., L. smimensis (Mousson, 1848). 53. L. conoidea (Leschke, 1914), L. abdidalem sp. nov., L. sewuensis sp. nov., L. sukoliloensis sp. nov., L. pacitanensis sp. nov., L. intumescens (Martens, 1867), L. madurensis sp. nov. 54. L. rotatoria (Pfeiffer, 1842), L. nodifera sp. nov., L. parahyangensis sp. nov., L. schepmani (Möllendorff, 1897), L. zonifera sp. nov., L. ciliocincta (Möllendorff, 1897), L. pakidulan sp. nov. 55. L. epiplatia (Möllendorff, 1897), L. monticola van Benthem Jutting, 1950, L. davini Dharma, 2015, L. menorehensis sp. nov., L. dharmai sp. nov., L. moussoniana (Martens, 1867).

Figs 56–59 (opposite page). Shells of species of Landouria from Java. 56. L. abdidalem sp. nov., Yogyakarta, Kulonprogo, Sabrang Kidul (holotype, MZB 17664). 57. L. madurensis sp. nov., East Java, Madura Island, Sampang, Nepa Monkey lowland rainforest (holotype MZB 21432). 58. L. sewuensis sp. nov., Yogyakarta, Gunung Kidul, Tepus, Mbajo Hill (holotype, MZB 19255). 59. L. sukoliloensis sp. nov., Central Java, Kayen, near Watu Payung (holotype, MZB 19219). Scale bar: 5 mm.